William e



(ModeL) W. E. SPARKS.

LATCH.

Patented Jun 19 I Ill/II/I/I/I/ 1 I l I III/II I W 1 N. PETERS.Pnoao-Lillm m hev. Washmglon. DC.

UNITED STATES PATENT OFFICE.

WVILLIAM E. SPARKS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO P. & F.CORBIN, OF SAME PLACE.

LATC H.

SPECIFICATION forming part of Letters Patent No. 2729,837, dated June19, 1883.

Application filed February 5, 1883. (Model.)

To all whom it may concern:

Be it known that I, WILLIAM E. SrARKs, of New Britain, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Latches, of which the following is a specification.

My invention relates to improvements in that class of latches which arecommonly called anti-friction, from the fact that the latch is providedwith a lever or swinging cam, to cause the latch bolt to be forcedinward smoothly and easily under the influence of the striker; and theobjects of my invention are to so hang the swinging cam-lever that thepinand-slot connection thereof may be between the cam-lever andlatch-bolt, and so that the cam-lever may be made with trunnions formedintegral therewith, and so that the support for one trunnion or pin ofthe said lever may be formed on the broad side of the latch-case insteadof the face-plate. I attain these objeets by the constructionillustrated in the ac companying drawings, in which- Figure l is a frontelevation of parts of my latch with the cap-plate removed. Fig. 2 is ahorizontal sectional view of my latch online :1 0c of Fig. 1, andshowing the parts whieh'are above said line. Fig. 3 is a like view of mylatch as adapted for a left-hand door. Fig. 4 is a side view of thecam-lever, and Fig. 5 is an edge view of the same.

A designates the latch case; B, the capplate; C, the face-plate; D, thelatch-bolt, and E the cam-lever. These parts, when consideredindependently of certain features of construction hereinafterparticularly pointed out, are old, and are hereby disclaimed.

The mechanism for drawing the latch-bolt into the caseby means of theknob-spindle may be that of any ordinary construction.

In the prior construction of the latch-case, latch-bolt, and cam-lever,thelatch has been pivoted or hinged to a lug or lugs 011 thefaceplate,said lugs and one corner of the camlcver being drilled and securedtogether by a pin, and the other corner of the cam-lever has beenconnected with the latch-bolt by a pinand-slot connection. I form thecamlever with rigid trunnions a a, projecting from its opposite sides atthe two pivotal corners, as shown most clearly in Figs. 4 and 5, and Iprefer to form said trunnion integral with said cam-lever. One of thesetrunnions, a, is received in a hole drilled in the side of the latchbolthead, as indicated by the broken circle in Fig. 2. The other trunnion,(1/, lies within a slot or recess formed in the lug I), cast orotherwise formed 011 the broad side of the latclrcase A, and is confinedtherein by the cap-plate C. When the latch-bolt is extended the edge ofthe cam-lever, which slightly projects beyond the sides of the trunniona, comes into contact with the cap-plate, and the slot shorter, as shownin Fig. 3, and in order to have the cap-plate C confine the trunnion, alug or projection, c, is formed on the capplate.

By my improved construction the trunnion a is brought nearer to the sideof the latchcase than in the prior construction, havingthe pivoted lu onthe face-plate, and the trunnion moves in the slot or recess inlllllSOl] with the movement of the cam-lever, 1nstead of in the oppositedirection, and thereby it is believed that my device works much moresmoothly than in the prior construction. By forming the truimion-recessin lugs on the broad side of the latch-ease instead of on the faceplate,1' am enabled to form the trunnion-recess by casting, to form solidtrnnnions 011 the cam-lever, to avoid drilling and fitting for'thetrunnion, and to more readily put the latch into the case and take itout when desired, as the same can be done without the employment of anyseparate and independent pin.

I claim as my,'invention In a latch having the pivoted cam-lever, thelug formed on the broad side of the latchcase, and having the trunnionslot or recess in its edge, the cam-lever being provided with the rigidtrunnion (1., which is confined within said recess by the cap-plate,substantially as described, and for the purpose specified. V

\Vitnesses: XVILLIAM E. SPARKS.

CHARLES Pnen, HENRY A. BAILEY.

